Agate was discovered with the Stone Age man in France 20,000-16,000 BC. The Egyptians used it prior to 3000 BC. Agate was highly valued by ancient civilizations. Said by the ancients to render the wearer invisible.
The agate-working industry grew up centuries ago in the Idar-Oberstein district of Germany, where agates were abundant.
Cameos are cut from stones, such as onyx or agate, where different colors occur in layers. The background material is cut away, leaving the cameo design in relief.